Which of the following is an example of an open-ended question?

An open-ended question is designed to encourage a thoughtful response, allowing the individual to elaborate on their thoughts, feelings, or opinions. The choice that best exemplifies this is the question that asks, "What do you think about this approach?" This type of question invites a more detailed and comprehensive response rather than a simple yes or no answer.

In contrast, the other options are closed-ended questions that typically prompt brief answers or confirmations. For instance, asking if someone is comfortable with a task or if there is a problem usually leads to a straightforward affirmative or negative response. Similarly, inquiring whether someone can perform a task also elicits a limited answer. Open-ended questions are valuable for fostering discussion and gathering more nuanced information, which is why option B is the best representation of an open-ended question in this context.